#red{
	width: 99%;
	height: 99%;
	position: absolute;
	moz-user-select: -moz-none;
	-moz-user-select: none;
	-o-user-select:none;
	-khtml-user-select:none;
	-webkit-user-select:none;
	-ms-user-select:none;
	user-select:none;
}
.box_bj_rbga{
	position: fixed;
	top:0;
	left: 0;
	width: 100%;
	height: 100%;
	background-color: rgba(0,0,0,0.4);
	z-index: 300;
	text-align: center;
}
.box_bj_rbga .box_bj_img{
	width: 100px;
	position: absolute;
	left: 50%;
	top:20%;
	margin-left: -50px;
}
.box_bj_rbga .box_bj_img img{
	width: 100%;
}
.demo-class img{
	display: block;
	width: 100%;
}
